Nut-lock.



No. 644,849. Patented Mar. 6, I900.

T. W. CROZIEB.

NUT LOCK.

(Application filed Mar. 1, 1899.)

(No Model.)

' e-Aiiorge ys,

STATES NUT-LOCK.

SPECIFICATION forming part of Letters Patent N 0. 644,849, dated March6, 1900.

Application filed March 1, 1899. Serial No. 707,253. (No model.)

T0 whom, it may concern:

Be it known that I, THOMAS WASHINGTON OROZIER, a citizen of the UnitedStates, residing at Roanoke, in the county of Roanoke and State ofVirginia, have invented a new and useful Nut-Lock, of which thefollowing is a specification.

This invention relates to nut-locks; and the object thereof is toprovide a simple and efficient device of this character in which the nutwill be firmly held on the bolt against retractive rotation caused byvibration and shock to which the bolt may be subjected.

My improved nut-lock is in the form of a washer having a flat bodyportion with nutengaging means and a plurality of prongs extendinginward into the bolt-opening, with their points arranged in a commonplane, which plane is at an angle to the plane of the washer-body.

The invention consists of other peculiarities of construction anddisposition of parts, which will be hereinafter fully described andclaimed.

In the drawings accompanying and forming a part of this specification,Figure 1 is a perspective view of a device provided with my improvednut-lock. Fig. 2 is a transverse section of the same, taken in the line2 2 of Fig. 1. Fig. 3 is an enlarged detail of the washer and bolt,showing the spurs or prongs on the washer embedded in the thread of thebolt. Fig. 4 is a sectional elevation of the washer, the section beingtaken in the line 4 4 of Fig. 3 and showing by dotted lines thespurpoints touching a pitch-line conforming to that of the thread of thebolt.

Similar characters designate like parts in all the figures of thedrawings.

The ends or abutting portions of two overlapping plates are shown at 2and 3, respectively, (see Figs. 1 and 2,) and the lockingbolt 6 extendsthrough alined apertures formed in the overlapping portions or tongues4E and 5 of said plates, this being a common form of joint and beingillustrated simply to show the nature of the invention. The nutlock, ofcourse, can be used to hold any two members in assembled relation.

The nut is designated by 8, and it is held in a fixed position adjacentto the plate 2 by a locking-washer 9,said washer being stamped andcompleted for use at one operation from, preferably, resilient sheetmetal, and is bent or deflected on straight lines tangentially near itsouter edge to provide a series of projecti.ons,as 10, located atsuitable intervals apart and offset from the body thereof to form atsame side of the washer and are gradually inclined from one end to theother, the lowest point of one projection being adjacent to the highestpoint of the other, the portion of the washerbetween the projectionsbeing fiat, so as to lie fiat against the object. The lockingwasher hasa substantially-central aperture or opening 12 to receive the bolt 6 andis equipped with a series of spurs or prongs 13, having sharpened orpointed ends which are adapted to be forced transversely or crosswisethrough the thread of the bolt by the operation of the nut as the latteris turned on the bolt, and the points of the spurs or prongs, as will beevident from an inspection of Fig. 3, touch a circle bounded by theperiphery of the boltbody, by reason of which they can be thrust intothe thread of the bolt by the advancing nut, and as a means forfacilitating the introduction of the washer the points of the spurstouch a pitch-line (see dotted line, Fig. 4) conforming to that of thethread of the bolt,so that said prongs can be successively inserted inthe front end of the groove between the thread, whereby when the washeris turned in the proper direction it can be led onto or oif from theboltthread with a screw-like action. Ordinarily the washer and thenutwill be simultaneously turned onto the bolt-thread, the washer beingin front, and these parts may be moved in unison until the washer abutsagainst the plate 2 or other part, at which time the further turning ofthe nut will immediately force the spurs into and across the thread.When the prongs are embedded sufficiently into the thread of the bolt,the further turning of the nut will be stopped, and it will be evidentthat the locking projections 10, by engaging the outer edges of the nut,will prevent retraction of the latter, and as the Washer is lockedfirmly against turning movement relatively to the bolt it will beevident that said nut cannot be shaken off or dislodged by jars orshocks.

It will be evident from the preceding description that my improveddevice includes, broadly, a bolt, a nut on the bolt, and alocking-washer adjacent to the nut and provided with a series of spursforcible into the thread of the bolt transversely or crosswise of saidthread by the nut Without changing the relative disposition of saidspurs.

Changes in the form, proportion, size, and the minor details ofconstruction within the scope of the appended claims may be resorted towithout departing from the spirit or sacrificing any of the advantagesofthis inven tion.

Having thus described the invention, what I claim is 1. Anut-lockconsisting ofa circularspringmetal washer provided with a bolt-opening,and having portions around its outer edge permanently bent or deflectedon straight lines tangentially to form laterally-oltset springprojections or shoulders for yieldingly engaging the sides of a nut, theprojections or shoulders extending from the same side of the washer andeach projection or shoulder having a gradual inclination from one end tothe other, the portion of the washer between the shoulders lying flatagainst the object to which the nut-lock is applied, substantially asdescribed.

2. A lock-nut in the form of a washer having a fiat body portion withnut-engaging means, and a plurality of prongs extending inward into thebolt-opening with their points arranged in a common plane, which planeis at an angle to the plane of the Washer-body.

3. The combination with a threaded bolt and nut, of a locking-washerhaving a flat body portion with nut-engaging means, andinWardly-projecting prongs for engaging the bolt-threads, the points ofsaid prongs being arranged in a common plane which corresponds to thepitch of the bolt-thread, the prongs being adapted under pressure to beforced laterally into the bolt-threads, substantially as described.

In testimony that I claim the foregoing as my own. I have hereto affixedmy signature in the presence of two witnesses.

THOMAS WASHINGTON OROZIER.

Witnesses:

(J. O. TALIAFERRO, WM. M. DUNLOP.

